I have verified that this package works for ppc64. Please add the ~ppc64 KEYWORDS to net-misc/ntp-4.2.0-r2. my USE Flag is "gtk2 altivec ppc64 -gnome cjk jpeg gif png tiff truetype".
add deps on bug #55529 swig and bug #55530 libcap
Thanks Yuta!
stick a fork in it!